WHAT

I am reporting you to the Monsignor for obscene language

Wash your mouth out

Thnx MG I see what I did wrong, I was searching locally under workshop thread rather than the home page which goes across the whole site - stupid boy Pike again

Does anyone know of a source of short toothed (cogged) belts suitable for a lead screw drive.

I thought this would be a simple Ebay search but spent an hour to no good result

Maybe I am using the wrong keywords?

Any ideas pls

Brian

I would call these 3d sketches, artists illustrations, nowhere near regular engineering drawings for manufacture. Decide on some basic dimensions say bore and stroke and work outwards from there. After all you will have to interface with real world available components, nuts bolts, tubes, material thicknesses etc

Also work out how big your flywheel needs to be as scaling down half say wont work for example

But then I never went for model engineering and seeing old men sat on 5" gauge steam locos running round a back garden seemed a peculiar taste to me

OBTW Ive noticed one fundamental stumbling block, that is that the lead nut is fixed at the rhs side of the table so the lead screw winds in out out following the x slide - ie just like the Myford compound slide.

So attaching to the LHS end of the lead screw means an extension shaft (with horizontal slot for a drive Cog) poking out the full length of the table

Thats pretty clumsy I think

More work needed

Any ideas?

Has anyone had success in fitting a traversing motor to the lead screw on a DW or other m/c

Things to be considered I think

what feed rates were deemed suitable

Given a 10 tpi thread what size motor, rpm, torque, gear ratio, dc watts, variable speed control

How was it disengaged for manual operation

Are there any commercial kits available

ps

i have for example got an old cordless drill motor/chuck which looks promising

Edited By brian jones 11 on 18/08/2021 11:15:04

pps i dont thin i need to go to the trouble of limit sw cut outs

Edited By brian jones 11 on 18/08/2021 11:21:11

Wow i could eat my lunch off that m/c, why am I such a slut?

Those slot fillers are neat, Now Auntie Doreen is up to speed, I could mill out some strips in a heartbeat

Great tip thnx

WOW Newall system is a Rolls Royce system with a price to match ca£900 for a Bridgeport way out of my league

but I take your point with thnx that an accurate z axis system is rarely needed for a hobbyist so maybe £150 is a more likely option.

Anyone had experience with these cheap charlie offerings?

Yes indeed Brian I think I was extremely lucky when I bought my DW from the chap who made it. He was obviously a perfectionist and I havent found a single dodgy fit anywhere. I feel ther m/c hasnt done a lot of work and just needs TLC.

Having seen the video I am struck with wanting a DRO. I see a 3 axis kit for ca£200, I am wondering whether to stay with a 2 axix model as I dont see myself doing much precision Z work. After all most of the time you lock your quill Also fitting the slider on the spindle head is going to be a pig/lash up as theres not much room for placement. I am sure I could easily manage with a DTI for Z and it would save £50

Does anyone else place much value on a Z readout?

I followed up the sound advice and went for the Amazon link ER32 set ca£40. It arrived couple day on sunday evening!

Took me 2 mins to screw on the existing drawbar and the collet chuck was up and snug - just like that

Impressive so far what you get for your money 10 pce metric set. no markings on the chucks

So Auntie Myford is now respectable.

In the meantime I came across a youtube site offering milling m/c instruction - as i had no formal training

I would not normal suggest the usual old blowhard uncle Bubba rubbish that is largely informercial and a waste of time but I found this site extremely good very little product placing but some amazon links definitely useful anyway

So IMHO if you are coming from nowhere ( I never knew how little I knew) then I can recommend this tutorial

https://www.youtube.com/watch?v=FyuG-B95PQs&list=PLY67-4BrEae9m8v20LNARIRl9Pd9bdFRZ&index=1

I also came to understand how important a proper milling vice is (not the cheapo type used on pillar drills)

Its like having a lathe without a proper chuck

The other point made was that modern end mill design hss and carbide really transformed the role of the vertical mill Probably in my early years why I had so little exposure to them.

I associated them with jig borers and the toolroom ( a rarified room with aircon and only allowed entry to pass holders)

How many of you would be brave enough to tackle an apprentice piece to make a 1" precision cube +/- half thou

I have now trammeled my slide and found it +/- 2 though over 12". Is this something I should worry about. I see members using laser pointers. I dont envisage anything larger than 3" say

Thanx for all that valuable help it has really put me on the right road

I knew this would cause trouble. I wont make the mistake of posting Ebay links again. You are damned if you do and damned if you dont.. Do I need that grief

Ebay is a minefield - caveat emptor

Well guys I have taken on board all the wise counsel and seen the error of my foolish notion of using an old chuck. I have ordered the Amazon ER32 recommendation and its supposed to be coming this Sunday - amazing. As said, owning a mill is not a cheap hobby and so I shall equip myself properly in due course. I dont have much experience on mills and no formal training thereof.

It seems that an xy DRO is a rather essential must have on a mill like this

I shall look for advice from other members as to how they arrived at a satisfactory assy. Some of the kits I have seen seem like a lot of trouble to fit. I would want one with a proper screen readout

I expect to do quite a bit of sheet drilling eg making instrument panels which requires a lot of xy coords for centre drilling. Doing this manually on the dials is tedious and easy to make a mistake vs working directly from drg and dialing in the required distances = well thats my guess

thnx for all the help

I think the policy here is not to link to foreign sellers not uk based so I can only suggest a search on EB

, you pays your money you takes a chance as they say. be sure to read the whole thread here

50mL Engine Machine Lubricator Oil Gravity Drip Feed Oiler

Edited By brian jones 11 on 14/08/2021 02:39:25

Both new oilers in place, great improvement on old ones which leaked and didnt drip properly

msg sent, but the in box doesnt show it as msg read?

FWIW screw threads are surprisingly inefficient clamps

eg take a screw (bottle) jack, tests were don in the 1850s to determine how much force was transmitted to the load, for a given torque

bottom line you can lose NN %

just for fun , no cheating with google

What do you think the percentage might be off the top of your head

OBTW thanx for the wisdom, I am suitably humbled for my precocity = stupid boy Pike

Edited By brian jones 11 on 13/08/2021 17:19:45

Well come on Myfordians rescue this initiative, someone make an offer to buy all 6 add pnp £2.45 large letter to go through post box looks like its already in a suitable box

check weight and size ea

fyi large letter 350 x 250 x 25mm <750g

Edited By brian jones 11 on 13/08/2021 13:24:47

OK JB I hadnt thought of bell mouth

I will check on this

I presumably could re grind the jaws in situ, or maybe use a Covid cutter to skim out the jaws parallel (i realise this is not as easy as it sounds)

"helix pulling the cutter out"

I hadnt thought of that, it would explain why i ended up with a deeper cut than when I started on one job

Edited By brian jones 11 on 13/08/2021 13:27:04